Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9d0e8f40a23f44a…

MALICIOUS

PDF

77.5 KB Created: 2021-03-30 22:37:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: caa5cc1e892ff392c0b50b6633e9cbb2 SHA-1: b9738fa2c4d0327b5baab3959ab30cd79a35bcb5 SHA-256: f9d0e8f40a23f44a2f8493791ba78d2bac28a757018fae8ad77f2ce1e0c20491
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a password-protected-archive lure. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://jottigo.ru/wix?keyword=life+of+pi+literary+devices+quotes PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4382430/normal_601d66c0c8076.pdfIn PDF document text
    • https://cdn.sqhk.co/kuwusemob/CtgeAkE/xujugu.pdfIn PDF document text
    • https://cdn.sqhk.co/novupezezis/yjehagP/las_vegas_phone_number_area_code.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454990/normal_5ffb7b832203e.pdfIn PDF document text
    • https://cdn.sqhk.co/medujebukoma/ejgijIl/kohls_30_online_discount_code.pdfIn PDF document text
    • http://detonic-italia.website/psd_website_templates_for_wordpressksdfl.pdfIn PDF document text
    • https://cdn.sqhk.co/welosezu/gUaOtgi/72850940397.pdfIn PDF document text
    • http://you-bestshop.xyz/convert_to_jpg_windows_10_download_freewrtbd.pdfIn PDF document text
    • http://boldly-grow.com/28419666650fht9x.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/banula/default_password_for_linksys_router_ea2700.pdfIn PDF document text
    • https://s3.amazonaws.com/napisakaluja/zurego.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cb428ed-d7b8-4976-b3b9-483f0f95a43c/fezudozo.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/dell_sonicwall_vpn_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xijilesuzuxo/catabolismo_proteico_muscular.pdfIn PDF document text
    • https://s3.amazonaws.com/wamatasamegu/total_gym_1000_parts_canada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d11f278-4e2f-4ce0-a140-3014ca15ab17/99701760262.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e25d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE25D 4136 bytes
SHA-256: 5e3231f5519e05dfd04fdf6e940e29d61c91b404c2e1955c73b7c521890b03d5
font_01_sfnt_off0000f11c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF11C 5376 bytes
SHA-256: 3aefbea3fc2f087eab0ab0f025a0572dfc68dcf493be5abc8913761f3fdd4002
font_02_sfnt_off00010387.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10387 10660 bytes
SHA-256: 99631e55d840d8e427d45930aba088cf8041e2d21de850eed1dcd1bfe28f662c

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